Checker-work



Nov. 8, 1927.

v A. J. F. J. COUSIN CHECKER WORK Filed March 25, 1927 VIHVU- Patented Nov.4 8, 192'?.v

" 'oie srai ARTHUR JULES'FRANQOIS JOSEP-IVCO.J"SI1\T,l 0F SERAING, BELGIUM, V.ASSIGNOR TOk S0- CIT ANONYME JOHN oociinnirn, or snRa'ING, isnLGiUivt, A COMPANY.

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Appiieaiiqn ined March 25, 1927",` serial Naivaezo, and inv seigium spines, 192e.

My invention relates to,A improvements in the checkeriworks of the apparatuses which are used for heating the air which is to be4 introduced in blast furnaces. p Y

As it is well known, `the checker 4works which are now in use and which are formed of bricks of little section do not possess the required stability, mostly after they have been working during a rather long time at a high temperature.V f y These well known refractory. brickworks are generally composed of bricks which are provided with thinwalls and which are piled up so as to form high columns.. This construction has for its object to secure the greatest-heating surface possible. l v

v The columns thus formed however have no stabilityl by. themselves and are only held in placel byV thefreciprocal support produced by their mutual contact. This support which is sufficient so long as the columns remain in a vertical position, has a .tendency .to fail when contractions occur under the action of the heat upon the refractory material, `these contractions interrupting the contact between the columns which loose their verticalityr and tendto take an inclined position. v

This tendency which takes place firstly in the upper parts ofthe checker works is graduallyr transmitted towards the lower parts and finally results in the overthrowing of all the regenerating system which vdoes no more provide a free passage for the gas or air.

In order to obviate thesev disadvantages,

it has been suggested to use numerous formsv of special bricks provided with interlocking` means such as projections, hooks and the like. These bricks are very expensive, rc-

quire materials of 'first quality and are very liaving a square form. I

, Fig. 4:.

ment of bricks forming a layer of a checkerwork according to my invention thebricks Fig. 2 isa front elevation and Fig. 3 a sideelevation,corresponding to Fig, l. i Y, y

l is a viewv similar' to Fig. l, the layer being formed with'circular bricks. Figs. 5 and 6 are respectively a front elevation and a side elevation .corresponding to The checker work forming they subject matter of my .invention comprises a series ofv superposed ylayers of brickworks one of which is indicated on the drawing. -Each layer is formed of an equal number of rows of simpleand double bricks which arelarranged iii-alternate lines-so as to form a com bination ofthe following rows of 'bricks n One row 1--l'ofsimple hollow bricks ra leaving free betweenthein spaces or kinter-'- vals b for the passage of the warm gases and c for the passao'e of the blast or reciprocally.

(2) one .mitl Q `each ubeing provided with a circular opening p l p e of aoubisbfieks a. l i fformed by they juxtaposition of two-simple spendk ,to the spaces or intervals b between 1 the bricks of the i'iist row. v

(V4) One row 4 4 vof double bricks' l placed in the drection B-B at right angles to the line Ae-A. p

Each doublebrick (Z of the rows 2 2 or 4 4 is in contact by the edges c with the next double brick in the same rowjaiid bythe other edges f with the next simple bricks in the rows l-l or 8--3 seas to cooperate with the latter to the formationof the ducts g for the passage of the gases.

As shown on Figs.- l, 2,' 3 the bricks gener'- ally possess a square section, but they may also receive any otherlsuitable form such as a round (Fig. 4)' or polygonal section. A f When round bricks are used, the arrangement of the` rows. of bricks is the same, but the double bricks d are tangential to the neXtV double brick and also to the simple l bricks of the rows 1-41 and v3--3.

In order to avoid the sliding of the rows 10 Y Y and Figs. 5 and 6 respectively..

direction, the height of' the simple bricks may be different from that of the double bricks at least orfthe first under layer so that the diierence oi:` height secured in this lovver layer can be maintained in therseif'eral layers although using, for the upper layers bricks having the saine height. In such conditions the several rows of simple and double bricks are' placed at different levels Vin a lsame layer as it Will appear from Figs. 2 yand 3 Such a construction' maint'ainsrthe stability, the alternate rows of double bricks avoiding the overthroi'ving in twodirections l at .right anglesto eaclji'othcrl and producing a support 'for kthe lines of but this stability Wouldbe obtained at the l"expenseof the heating' surface, as itis the cas'ey WhenV bricks of special forms are used.

Thed'oiible bricks are obtained by the unta ositi'on of two sim le bricks moulded i P i i Y Vsiiniiltaneously so as to be connected to each `other-on a'rather little po'rtionh of vtheir periphery.

In the checker'vvorks 'which must beV subV- mittedto'a high temperature in 'their .Whole f mass, the number' of simple bricks must be v so eqiial'to that of the double bricks. In other the case of cylindrical rows of simple' Signature.

kind of regenerators and inthe parts which must be siibmitted'only to aV moderate tein- -peratiire (less than 1000O C. in the Cori/per .apparatus for example *the system herein` before described may be kept for the most heated parts of the construction, the other parts being built only with simple bricks.`

The price of the double bricks is .very Ylow as indeed bricks of 'this kind can be made by means of earths Whichy are only a little aluminous and very ch`eap. v Theyare moreover very resisting. and not ad'aptedtobe injured vr by handing. ,They areiiiiprvidea 'with hooks, or other 'interlocking means even Iin v n v bricks. t 1 Vil'hatl claim is: i

l. In a checker .work comprising a plurality superposedlayers oiibricks, rows'of Y simple'bricksandroivsf'of double bricks the rowsl of simple bricks alternatingfvviththe i rows ofi doiible'brickslin each layer.

2. 'In a checker vWork comprising alpl'iif l rality of superposed layers offb'rifcksrows'oi* simple bricks'and rows oif doiib`le -bi'1cks, the bricks in the rows of simple' bricks lbeing placed at intervals fromI each other. 'and being displaced relativelyftojeach other in the successive rows and the" bricksi'in the rows of double Vbricks bei'rg" alternately arranged in directions atv right angles to Cil each vother in the successive rows of doublev i bricks.y Y n In testimony Whereoflfhave ahxe'd ARTHURfiULiisFRANois J'osEP-HtoUsIN. y 

